公开(公告)号：US20240018278A1

公开(公告)日：2024-01-18

申请号：US18253835

申请日：2021-11-17

Applicant: ExxonMobil Technology and Engineering Company-Chem

Inventor： Francis C. RIX ,  Charles J. HARLAN ,  KyKA LE ,  Xiaodan ZHANG

IPC: C08F4/52

CPC classification number: C08F4/52 ,  C08F2410/01 ,  C08F2500/04 ,  C08F2500/17

Abstract: The present disclosure relates to processes for forming alumoxanes and catalyst systems thereof for olefin polymerization. In at least one embodiment, a process includes forming a solution by, in an aliphatic hydrocarbon having a boiling point of less than about 70 degrees Celsius, introducing at least one hydrocarbyl aluminum with at least one non-hydrolytic oxygen-containing compound and a support material. The molar ratio of aluminum to non-hydrolytic oxygen in the solution is greater than or equal to 1.5, and the combining is conducted at a temperature of less than about 70 degrees Celsius. The process includes distilling the solution at a pressure of greater than about 0.5 atm to form a supported alumoxane precursor. The process further includes heating the supported alumoxane precursor to a temperature greater than the boiling point of the aliphatic hydrocarbon fluid and less than about 160 degrees Celsius to form a supported alumoxane.

公开(公告)号：US20240400804A1

公开(公告)日：2024-12-05

申请号：US18696216

申请日：2022-10-04

Applicant: ExxonMobil Technology and Engineering Company-Chem

Inventor： Nino RUOCCO ,  Maria Josefina CARBONE ,  Etienne RH LERNOUX ,  Michael A. LEAF ,  Wen LI ,  Adriana S. SILVA

IPC: C08L23/08 ,  C08J5/18

Abstract: The present disclosure relates to polyethylene blends, films thereof, and methods thereof. In at least one embodiment, a polymer blend includes a first polyethylene having a density of about 0.94 g/cm3 to about 0.97 g/cm3 and a melt index of about 0.1 g/10 min to about 10 g/10 min. The blend includes a second polyethylene comprising at least 80 wt % ethylene derived-units. The second polyethylene has a density of about 0.918 g/cm3 to about 0.945 g/cm3, a number average molecular weight (Mn) of about 10,000 g/mol to about 20,000 g/mol, a weight-average molecular weight (Mw) of about 75,000 g/mol to about 300,000 g/mol, a melt index (2.16 kg) of about 0.1 g/10 min to about 5 g/10 min, a high load melt index (21.6 kg) of about 25 g/10 min to about 80 g/10 min, and a melt index ratio of about 10 to about 50.